我县一台X195型柴油机连续断了三根平衡轴,其断裂部位是在平衡轴与平衡轴固定盘的连接部位。起初误认为平衡轴质量差,但换上新平衡轴,装机后没多久又断了。经认真检查,发现平衡轴与机体的连接位置发生了变化。其原因是:由于原固定平衡轴的螺钉松动,螺钉与机体产生摩擦,致使机体螺钉孔径扩大,这样,虽然紧固了螺钉,但平衡轴齿轮与曲轴 A X195 diesel engine in our county continuously disconnected three balance shafts, and the fracture site is the connection part between the balance shaft and the balance shaft fixing plate. At first mistakenly believe that the balance shaft quality is poor, but put on a new balance shaft, not long after installed and broken. After careful examination, found that balance shaft and the body of the connection position has changed. The reason is: As the original fixed balance shaft screw loose, the screw friction with the body, resulting in the body to expand the screw diameter, so that although the fastening of the screw, but balance shaft gear and the crankshaft